MC has no line number gutter in editor. Removed:
- Gutter rendering in editor/render.rs (body_area = inner, no gutter_area)
- relative_lines field from Editor struct (both constructors)
- ToggleRelativeLines enum variant from EditorCmd + menubar item
- Alt-N keybinding in handlers.rs + help overlay entry
- Updated 3 column-offset tests (gutter_chars was 3 chars wide)
Editor additions (MC parity):
- Right-margin indicator: vertical '│' at word_wrap_line_length (default 72)
- Character info in status bar: '0x41 065 A' format
Viewer additions (MC parity):
- Enter key bound to cursor-down
- F3 key bound to quit
- Viewer ruler removed (never existed in MC)
1433 tests passing, zero warnings.
vasilito
0b9831f93d